I’m not 14, but it still depends on what you play. Playing games from bed, couch, toilet, garden - it’s fun.

I saw that you’re looking for used LCD, check out valve refurbished prices too. Any used price you pay should be lower than that IMHO. The prices right now tanked for LCD models, so if you’re on budget there was never better moment to get LCD model.

Now, if you play online multiplayer games mostly you might be disappointed - especially if the anticheat doesn’t work on linux.

Indies? 100% instant buy.

Newest AAA games? Those might not run and/or look well enough to play them on SD, when you can get them looking beautifully on decent gaming pc. You can stream to your steam deck, which is still pretty good experience, but some people hate streaming too much.

Older AAA games? Up to PS4 era everything should run pretty decently on SD, with pretty decent look and visuals. That’s a point where you probably won’t feel that you’re sacrificing too much. There are exceptions, for example Uncharted 4, while in theory PS4 game, for me didn’t look good enough on SD with fluid settings. But something like Horizon Zero Dawn, for example, worked fine.

You can use page called protondb and amother steamdeckhq to look up how well games work on Steam Deck before you even buy. There are also dozens of videos showing off games on youtube. Just note, that some games might run a little better now than on reports/youtube, since recent steamOS update improved some stuff on software side.

Overall, you also should be able to resell this used SD with not much value loss (if any) if you don’t like it, since you’re going to buy it pretty cheap anyway. So the risk is low anyway.